View the privacy policy here.

What is Sennheiser SpeechLine?

What is Sennheiser SpeechLine? SpeechLine Digital Wireless is a digital wireless microphone system for speech and lecture. It is designed and optimized for university and corporate use.

Thanks to its broad product portfolio, the system is particularly versatile and can be adapted to the requirements of individual applications. With the introduction of the new SpeechLine Multi-Channel Receiver, SpeechLine Digital Wireless presents the perfect audio solution for IT integration. Long battery life and easy end-user operation make Sennheiser SpeechLine Digital Wireless a real workhorse for daily continuous use.

The digital microphone system supports the latest IT standards, numerous connectivity such as Dante™ and PoE and can be completely remote controlled with the Sennheiser Control Cockpit software.

What is Sennheiser SpeechLine?.

Packed with state-of-the-art IT standards

Equipped with the latest IT standards, the new SpeechLine Multi-Channel Receiver meets the demands of IT managers and integrators around the world. It provides IEEE 802.1X authentication for easy and safe network deployment as well as PoE and Dante™ straight out of the box.

What is Sennheiser SpeechLine?.

Compatible with existing IT & AV infrastructure

Integrate the SpeechLine Digital Wireless microphone system into any existing AV infrastructure, thanks to analogue audio outputs of the Multi-Channel Receiver and Rack Receiver. The multi-channel receiver also features an integrated auto mixer and digital audio outputs for effortless integration into your existing IT infrastructure through up to two Dante™ ports. 3rd party control protocols and plugins enable interoperability with other systems.

What is Sennheiser SpeechLine?.

Secure operation

Secure operation with SpeechLine Digital Wireless. Your confidential conversations are encrypted with AES 256-bit and remain protected. Thanks to the IEEE 802.1X authentication, all SpeechLine Multi-Channel receivers can be easily and securely integrated into your network. The two RJ45 ports can be individually configured: split the control and audio to separate networks for more security or use both ports in a redundant Dante™ network for maximum reliability. Manage your Dante™ setup securely with the Dante Domain Manager™.

Dedicated to speech

SpeechLine Digital Wireless is made for the spoken word. Speech optimized Sennheiser microphone capsules and built-in equalizers with presets for female and male voices ensure optimal speech intelligibility in every situation. The SpeechLine Multi-Channel Receiver automatically mixes multiple speakers at the same time with an integrated Automatic Audio Level Management so that each person can be clearly understood.

No hardware interaction required

All Sennheiser SpeechLine Digital Wireless microphones are very easy to use. The presenter simply takes the microphone out of the charging station and is immediately ready to go. The end user does not need to have access to the receiver. Avoid classic user errors by installing the receiver in a not publicly accessible location. For the Rack Receiver, for example, this would be a lockable IT or AV rack. The Multi-Channel Receiver can be mounted easily and unobtrusively on the wall or ceiling.


For podium discussions, SpeechLine Digital Wireless provides the easiest to handle wireless SL Tablestand 133-S/ 153-S DW for panellists and the SL Handheld DW for questions and reactions from the audience.

A future-proof investment

Sennheiser SpeechLine Digital Wireless operates in the license free 1.9 GHz frequency band and is a future-proof investment. The free Sennheiser Control Cockpit opens up an important path to your future. Digital workflows for monitoring and controlling your entire system help you to reduce maintenance and servicing costs. SpeechLine Digital Wireless uses the DECT license-free 1.9 GHz frequency range. This RF standard is also used by wireless telecommunications systems and is considered the most future-proof frequency band for wireless microphone systems.

Presentation and lecture

For hands-free presentations, you can choose between wireless table stand, handheld or bodypack transmitter for use with lavalier or headmic – depending on the speaker’s preference.

Perfect IT integration

The system supports the most common IT standards and integrates smoothly into your existing IT infrastructure. Numerous connection options including two ethernet connectors with support for Power over Ethernet (PoE) and Dante™ make the system the ideal enhancement for your campus or corporate network. SpeechLine Digital Wireless can be operated as a stand-alone system or integrate into a 3rd party environment using plug-ins and protocols.


For conference rooms, the highly flexible wireless SL Boundary 114-S DW ensures best speech intelligibility and ease-of-use for all meeting participants.

How many microphones in one room?

Depending on the regional regulations it is possible to get up to 20 microphones in one room. With the Multi-room option the channel number can be increased.

Will you need a license to use SpeechLine?

Sennheiser SpeechLine Digital Wireless is using 1.9 GHz DECT range, which is well known from the telephone market. Due to this fact the use of SpeechLine Digital Wireless is future proof and license free.

What transmitters are available?

  • SL Handheld DW

  • SL Bodypack DW

  • SL Tablestand 133-S DW (with 3 pin XLR for gooseneck mics)

  • SL Tablestand 153-S DW (with 5 pin XLR gooseneck mics)

  • SL Boundary 114-S DW

Sectors & Applications. Where is Sennheiser used?

Today Sennheiser’s range of products are used by Bands, Studios, Clubs, Venues, Rental Companies and Installers across the world. It’s used in the Live Sound, Pro Audio, Recording & Broadcasting sectors.

Back to Articles